Orsini Upper Respiratory Tract Flashcards
Functions of the upper respiratory system
Modify inspired air, thermoregulation, defense against harmful substances, olfaction, vocalizing
Auditory tube
Passage from nasopharyngeal to the cavity of the middle ear
Guttural pouch
Ventral diverticulum of the auditory tube. The stylohyoid bone separates it into medial and lateral
Functions of the larynx
Protection of the airway against food and vocalization
Vestibule
Rostral opening to the vocal folds
Glottis cleft
Narrow opening of the larynx formed by the vocal folds and vocal processes of the arytenoid cartilage
Infraglottic cavity
Caudal to vocal folds
Single laryngeal cartilages
Epiglottic, thyroid, cricoid
Paired laryngeal cartilage
Arytenoid, corniculate, cuneiform
Type of cartilage for epiglottis
Single, elastic cartilage, attached causally to the thyroid cartilage
Arytenoid cartilage characteristics
Hyaline cartilage, paired, articulates with the lamina of the cricoid at the cricoarytenoid synovial joint
Thyroid cartilage characteristics
Hyaline cartilage, single, contains left and right lamina
Lamina articúlate with cricoid cartilage via cornua
Can calcify
Cricoid cartilage
Hyaline cartilage, single, ventral arch and dorsal lamina, it is subject to calcification and articulates with the arytenoid and thyroid
Corniculate characteristics
Paired, elastic cartilage fused with the apex of the arytenoid
Cuneiform characteristics
Paired, elastic cartilage fused with the epiglottis in the horse and the arytenoid cartilage in the dog
Vestibular folds
Elastic vestibular ligament between the arytenoid and thyroid
Vocal folds
Elastic ligament from the vocal process of the arytenoid to the thyroid
Aryepiglottic fold
From the lateral edges of epiglottis to the arytenoid
Forms cranial opening of larynx
Laryngeal ventricles
Between vestibular and vocal folds, from the thyroid to the arytenoid
Cricoarytenoideus dorsalis
O, I, F, In
Origin: dorsal lamina of cricoid cartilage
Insertion: muscular process of arytenoid
Function: opens the glottis
Innervation: caudal laryngeal nerve from the recurrent laryngeal nerve
Cricoarytenoideus lateralis
O, I, F,
Origin: ventrolateral cricoid
Insertion: muscular process of arytenoid
Function: adduct airway
Innervation: caudal laryngeal nerve
Thyroarytenoideus O, I, F, In
Origin: thyroid cartilage
Insertion: arytenoid cartilage
Function: relax the vocal fold and restrict glottis opening
Innervation: caudal laryngeal nerve
